package com.tan.config;

import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Plugin;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.type.TypeHandlerRegistry;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.text.DateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.Properties;

/**
 * @author longshifu
 */
@Intercepts({
		@org.apache.ibatis.plugin.Signature(type = org.apache.ibatis.executor.Executor.class, method = "update", args = {
				MappedStatement.class, Object.class }),
		@org.apache.ibatis.plugin.Signature(type = org.apache.ibatis.executor.Executor.class, method = "query", args = {
				MappedStatement.class, Object.class, org.apache.ibatis.session.RowBounds.class,
				org.apache.ibatis.session.ResultHandler.class }) })
public class MybatisInterceptor implements Interceptor {
	private Properties properties;
	private Logger logger = LoggerFactory.getLogger(MybatisInterceptor.class);

	@Override
	public Object intercept(Invocation invocation) throws Throwable {
		long start = System.currentTimeMillis();
		MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];
		Object parameter = null;
		if (invocation.getArgs().length > 1) {
			parameter = invocation.getArgs()[1];
		}
		String sqlId = mappedStatement.getId();
		BoundSql boundSql = mappedStatement.getBoundSql(parameter);
		Configuration configuration = mappedStatement.getConfiguration();
		Object returnValue = null;


		long end = System.currentTimeMillis();
		long time = end - start;
		String sql = getSql(configuration, boundSql, sqlId, time);
		logger.info("====sql===" + sql);
		try {
			returnValue = invocation.proceed();
			if(System.currentTimeMillis()-start >1000){
				logger.error("执行的SQL耗时: sqlId"+ sqlId +" 耗时: "+(System.currentTimeMillis()-start)+"毫秒, 字节数: "+(returnValue.toString().getBytes().length)+" sql: " + sql);
			}

			if(returnValue!=null && !"".equals(returnValue) &&
					returnValue.toString().getBytes().length>10000){
				logger.error("字节数较大的查询: sqlId"+ sqlId +" 耗时: "+(System.currentTimeMillis()-start)+"毫秒, 字节数: "+(returnValue.toString().getBytes().length)+" sql: " + sql);
			}
			return returnValue;
		} catch (Exception e) {
			logger.error("====执行错误sql===" + sql+", 消息：",e);
			throw e ;
		}

	}

	public static String getSql(Configuration configuration, BoundSql boundSql, String sqlId, long time) {
		String sql = showSql(configuration, boundSql);
		StringBuilder str = new StringBuilder(100);

		str.append(sql);

		return str.toString();
	}

	private static String getParameterValue(Object obj) {
		String value = null;
		if ((obj instanceof String)) {
			value = "'" + obj.toString() + "'";
		} else if ((obj instanceof Date)) {
			DateFormat formatter = DateFormat.getDateTimeInstance(2, 2, Locale.CHINA);
			value = "to_date('" + formatter.format(obj) + "','yyyy-mm-dd hh24:mi:ss')";
		} else if (obj != null) {
			value = obj.toString();
		} else {
			value = "";
		}

		return value;
	}

	public static String showSql(Configuration configuration, BoundSql boundSql) {
		Object parameterObject = boundSql.getParameterObject();
		List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
		String sql = boundSql.getSql().replaceAll("[\\s]+", " ");
		if ((parameterMappings.size() > 0) && (parameterObject != null)) {
			TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
			if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
				sql = sql.replaceFirst("\\?", getParameterValue(parameterObject));
			} else {
				MetaObject metaObject = configuration.newMetaObject(parameterObject);
				for (ParameterMapping parameterMapping : parameterMappings) {
					String propertyName = parameterMapping.getProperty();
					if (metaObject.hasGetter(propertyName)) {
						Object obj = metaObject.getValue(propertyName);
						sql = sql.replaceFirst("\\?", getParameterValue(obj));
					} else if (boundSql.hasAdditionalParameter(propertyName)) {
						Object obj = boundSql.getAdditionalParameter(propertyName);
						sql = sql.replaceFirst("\\?", getParameterValue(obj));
					}
				}
			}
		}
		return sql;
	}

	@Override
	public Object plugin(Object target) {
		return Plugin.wrap(target, this);
	}

	@Override
	public void setProperties(Properties properties0) {
		this.properties = properties0;
	}
}